I just replaced mine as one of the 3/32" shroud failed and I was dismasted last weekend. Fortunately there was an onshore wind. I was able to pull the mast aboard, hold a section of the sail up by the batten and create a kind of wind tunnel and to steer the boat ashore. I must say I don't know how old these wires were because I just got the 1982 Turbo this year.

I ordered a new set from a Hobie dealer (Backyard Boats) and the ones I received were 1/8". Like you, I was a little nervous sailing with the smaller diameter wire.